Use the_title of post as id value

Hi,

I would use the_title_attribute as a id value in a HTML Tag to use the value of id in CSS, for example :

<?php if (have_posts()) :
 while (have_posts()) :?>
 <h1 id="<?php the_title_attribute(); ?>"><?php the_title('','</h1>');
 the_post();
 the_content();
 endwhile;
 endif;
?>

This code works fine, but when the_title_attribute returns a string with space character, I can’t use it in CSS file.

How can I remove space in the_title_attribute? I’ve tested different PHP functions, but I’m not a PHP developer, and anything works.

Any other function I can use ?

Thanks for help.

Jenny